Hey nice work on that video documentation. That looks like a 283 flywheel forward with the Sherwood 4-port pump that has two impellers. These are nice motors, and the cool thing about them is the fact that they are standard automotive rotation, and by virtue of being turned around flywheel forward like that you still get the traditional RH prop rotation Chris Craft always used.
The cooling circuit looks to be a home built system for sure, adapted to the OSCO exhaust, etc., but that is not to say it wouldn't work. The Sherwood 4-port pumps are an oddity, I have this same basic motor on a 17' wood CC Sportsman, and the pump is run off a cam drive through the generator. In other words, the drive shaft for the pump actually travels through the generator. If you remove the generator from this mix, then the pump fits right in the same place the generator was, driven off the same drive type. The 4-port pump has two intakes, two impellers, and two output hoses, one going to each side of the motor for preheating.
Hey here is a tip for the photos. You notice these are larger than the thumbnails you copied from your photobucket album. On this page I copied your same image code but I removed the th_ part of the code which stands for "thumbnail". When you copy from the photobucket album, look for the codes under each image and you will see one called "DIRECT LINK"...........that's the one you want to copy and paste in web sites